Change test output due to change in ITK/GDCM.

The spacing parameter on the z axis when reading a single image
changed between ITK 5.3 and 5.4. Issue with change raised here:
InsightSoftwareConsortium/ITK#4794

This is due to the underlying change in GDCM
(MediaStorage::SecondaryCaptureImageStorage deriving the z spacing
from this information):
malaterre/GDCM@836f7a7

tests/test_scripts.py

@@ -46,7 +46,7 @@ def files_md5(self, ascii_file_list, binary_file_list):
             (
                 "per_file_data_characteristics.csv",
                 "per_file",
-                "912ede9ecfe519346f3a519f59215f6d",
+                "c1e073943a1e6160350df2376db42b12",
             ),
             (
                 "per_series_data_characteristics.csv",